N petxrs



(No Model.) 2 Sheets-Sheet 1.

J. SELWIG.

GENTRIPUGAL GOVERNOR.. n 2 120.292,512. Patented Jan.. 29,1884.

2 sheetsesheet 2.

(No Model.) v SEI-WIG l C'ENTRIFUGAL GOVERNOR.

Patented Jan. 29, 1884.

No. 29Z,51Z.``

'UNrrnn Sv'itAT-Es PATENT @Fi-ren JOHANNES SELYVIG, OF BRUNSVICK, GERMAVNY.

CIENTRIFUGAL GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 292,512, dated January 29, 1884.

To a/ZZ whom t 'may cm1/cern:

- Be it known that I, JOHANNES' SELWIG, a subject of the Emperor of Germany, residing at Brunswick, in the Empire of Germany, have invented an Improved Centrifugal- Regulator, of which the following is a specification.

My invention relatesto governors for steamengines and other motors, and it is designed, also, for use in connection with machines for indicating the speed of revolving shafts. r'

The object of my inventionis the production of an astatic governor-that is to say, one in whichthere shall be no preponderating inertiaV due either to gravity or friction, or to other causes.

To the above end my invention consists in the provision of l' a governor or regulator having rotating pendulums oscillating i-n circular paths, and in the combination therewith of' a series of mechanical devices, as ,hereinafter explained.

' In order that my invention may be 'fully understood, I will describe it with reference to the accompanying drawings, in which- Figure 1 is a side elevation of my improved regulator, transverse to the planes of the pendulum-arms. Fig. 2 is a similar view in line with the pendulumarms. Fi 0. 3 is a top view of my improved regulator, one half being in elevation and the other half being in section on the line a a of Fig. 1. `iFig. 4 is a transverse section on the line a a of Fig. 1. Fig. 5 is a side elevation of a modified form of my improved regulator, looking across the planes of the two pendulum-arms. Fig. 6 is a similar view, the loop being in vertical section and the pendulum-arms being removed. Fig. 7 is a'horizontal section of the loop, the pendulum and its support being shown in elevation. Fig. 8 is a horizontal section of the loop and connecting-rods. Fig. 9 is a plan View of one y of' the pendulums, its axis being shown in section. Fig. l0 is a cross-section of the .pendulum-axis on the line b b of Fie. 7, and looking toward the regulator-shaft. Fig. 11 is a detached view-(in two positions) of' a modified form of bea-ring for the pendulum-axis.

I will first describe 'my invention as embodied in the construction shown in Figs. 1 to 4., inclusive. In these figures, 1 designates the regulator-shaft, which, at its lower eX- Application filed June 29, 1889.. (No model Patented in Belgium May lf2, 188i', No. 57,8%, and in France May lf2, 1882,1(0. 148.9121.

valve of' a steam-engine, or to the ingressvalve of any other motor, or to the detent mechanism of devices for indicating the speed of rotating shafts, &c., the said shaft 1 being arranged to rise and fall, and these movements serving to operate the devices connected to t-he lower extremity of said shaft.

Surrounding the shaft l and turning with it is a collar, 2, which is formed with two bracket-arms, 2, on its two opposite sides, and extend upward above the top of' the sleeve or collar 2, as shown. Each of these bracketarms 21 constitutes the support for a cylindrical bar, which constitutes the axle of the pendulum. Each pendulum consists of' a hollow semi-cylindrical cast-ing, -l, formed upon the periphery of which are two balls, 5, extending outward radially from the casting f1, so as to form an angle of ninety degrees between them. rlhe castings lA are placed with their convex surfaces in opposite directions, so that the pendulum-balls on the one side of the regulatorshaft 1 are oppositely situated to those upon the other side, whereby, through the medium of' the devices (presently to be described) for connecting the pendulums to the shaft 1, the two pendulums balance each other. The upper extremities of the arms 2 are cylindrical in form, and bored centrally for the reception of the axle-bars 3, which are firmly keyed therein, and have bearings at their ends in screw-threaded plugs 3, which are adjustable in the ends of the castings 4.

Upon the periphery of' each ofthe castings 4, and at a point thereof near to the shaft 1, is formed a projection, et, in which is keyed or otherwise firmly fastened a short arm, 4", whose other end is looselyjournaled in a socket, 6, supported by cross-head 6 of the shaft 1. rlhe socket G is bored at an angle, so as to be in line or concentric with thc axis ofthe casting 4.

The operation of this device is as follows: Motion being imparted to the motor, the shaft tremity, may be connected to the throttle- 1 will cause the whole of the device, as above ball, 5, out until both balls are equidistantfrom the centre of' revolution. This necessai ier than the upper ball.

rily raises the one and lowers the other, which revolves the casting et on its axis, thereby raising the arm et, which carries with it the connection ft" G o, and consequently the shaft J The casting is prevented from revolving too far by a lug, 2", formed on the upper extremity of the arm 2".

The device illustrated in Figs. 5 to l1., inclusive, constitutes a somewhat more perfect embodiment, practically considered, than that just described. In this device the regulatorsbaft l is to connected, as before, at its lower end, with the ingress-valve,or detent mechanism,or other device, as the case may be, such devices being operated, as before, by the ascending and descending motions ot' the said Shaft. The collar 2 surrounds and turns with the shaft 1, as before. In this forni ot' my invention, however, the bracket-arms 2 are rcplaeed by a ring or loop, 6, keyed to the shaft l, and the semi-cylindrical castings Lt are replaced by arms 7, which are attached at their inner ends to (or are formed integrally with) the said loop G on the opposite sides thereof. The pendulum-balls in this ease are also somewhat modiiied in l'orm, though constructed upon the same principle as that of the pendu- ]ums rst described. In the present illustration (said Figs. 5 to 11) the balls are in what may be designated as dumb-bell7 forni, the lower ball of each pendulum being heav- These pendulums are secured to, or are formed directly upon, their axles 5,which arejournaled at their endsin the outer extremities of the arms 7 and int-he opposite side of the loop G, as shown. The projections et are here employed as before, .but each projection is arranged to work in connection with a second projection, making a pair of projections for each pendulum-arm, and the two, instead of being connected by a journal-connection directly to the regulatorshaft 1, as before, are journa-led upon one of two rods, 8, each of which is provided with a socket-ring, S, working between two stoprings, S". rIhese rods S are supported below bythe bracket-arms 2, and cary a weight, 5", which is provided with a central vertical bore, through which the shaft 1 passes, as shown.

In- Fig. 11 Ihave shown a modified form of bearing for the pelnlulum-arms in the rods 8. In this arrangement the rods 8 are placed a little farther apart than wouldbethe case ordinarily, and in place of the socket-rings inwardly-projecting pivots t) are secured to the rods S, and upon each of these pivots turns a roller, tlt. The inner cud of each axis, 5, isa conical roller, 5", th c upper face of which will be horizontal, and which rests beneath the roller 0". These rollers 5 are to be substituted for the projections Ll. 'ln this construction a mutual rolling takes place in the parts tl and 5" as the pendulums move upward and downward.

In the forni of :my invention shown in Fi l ro-4, inclusive, the balls 5 may be arranged either as shown in strong lines in Fig. .i or

estuaire as shownfin dotted lines in said ligure. In the latter case one of the balls is placed at one end of the periphery of the casting t and the other ball at the opposite end. In this arrangement, however, the two balls form the saine angle ot ninety degrees as in the iii-stmentioned arrangement.

The operation ot' the latter forni ot' my invention is as follows, the principal remaining the same in both instances, viz: The motor being set in operation, the regulator is caused to revolve horizontally around an axial line drawn vertically through the center ofthe shaft- 1. .lhis revolution is looking down upon the regulator from above, in a direction from right to left, or the same as the hands of a watch. As the velocity of revolution increases, the heavier ball lags behind the lighter one. This tends to elevate the lower one and depress the upper one, as in the other forni, thereby revolving the casting 5 on its axis. The ring orloop being secured to the shalt 1, the lugs et tend to elevate the rods S, which carry with them the collar i?, weight 5", and consequentlydepress the regulator-shaft it., which action serves to open and close the egress-valveof the motor, or to actuatc other devices according` to the purpose for which the regulator is used.

In the device shown in Figs. 5 to 1]. the movement of the pendulnms is nia-de to act upon the weight 5, such weight acting as a sort of counter-balamzc.

The relative positions ot' the weights and their actions are determined by calculation, so that the regulator shall be as nearly astatic as possible. Any novel subject-matter described but not claimed in this application I have reserved to be claimed in future original applications.

Having thus descril )ed my invention, thefollowing is what I claim as newthercin, and desire to secure by Letters latent:

l. An astatic ccntriingal governor consisting of two or more oscillatory pendulums 4revolving with the regulator-shaft, said pendulums consisting of a pair ot' balls mount-ed in different horizontal planes on an oscillatory axis, having suitable connections with the said regulator-shaft, whereby said shaft Wil-l be operated upon by the oscillati on ofthe pendulums, substantially as set forth.

2. In anastatic centrifugal governor,a pendulum consistingr ol' a pair of balls mounted in different horizontal planes on an oscillatory axis, whereby their centrifugal force will cause said axis to oscillate, substantially as and for the purposes set forth.

3. rIhe combination, with the regulatorshaft l and the sleeve 2, carrying brackets 2, ot' the pendulnms mounted upon ares secured in adjustable bearings in the said brackets, and having bearings in the said regulatorshaft, substantially as described. y

4. The combination, with the regulatorshaft il, having a (up, l, provided with bearings d, and the sleeve 2, carrying supporting- ICO . l p I 4 brackets 2", ofthe pendulum 5, secured later- 6. In an asta-tic centrifugal governor, the ally upon hollow semi-cylindrical castings 4, combination, with an oscillatory pendulum said semi-cylindrical castings having shafts 3, substantially as herein described, of a lug` or i 5 journaled in suitable bearings in semi-cylinstop to arrest its oscillation, as and for the 5 drieal bracket-'arms and loose connection With purpose set forth. the cap 6, substantially as and for-the purpose In testimony whereof I have signed this set forth. specification in the presence of two subscrib- 5. In a centrifugal governor, the eombi- I ing witnesses. nation of au oscillatory pendulum mounted JOHANNES SELVIG. 1o on suitable axis, substantially as herein de- Witnesses: v

scribed, and. a supportingbraekct having ad- HERMANN Trn'rz, j ustable bearings for said axis, as set forth. JoHs. KRACKH. 

